Short-circuiting rod



.Det 6, 1927. l

P. GOSSLAR SHORT CIRCUITING non Original Filed Nov. 24. 1924 iii Patented Der. 6, 192'" rareur OFFICE.

`:eatin GossLArJ, on Noinnieun, SWITZERLAND.

SHORT-CIRCUITTNG' ROD.

Application led. November 24,

19%, Serial No. 752,074, and in Switzerland July 17, 1924. Renewed ctober 28, 1927.

Very often there is a need in electric lines 'to take oli the current troni the wires so that these wires inay be handled without danger. This is generally done by short circuiting the respective line wires and was done heretofore by inea-ns of chains or cables.r These however did also endangerl the lives ct' the operators niore or less and it was proposed to use especially prepared rods or poles.

Tt is the object of the present invention to propose a short-circuiting rod which will work surely without requiring niuch skill in handling and without endangering the lite oi? the operator.

The invention comprises 'an insulator attached to a short-circuiting rod of insulating material and two telescoping inetal tubes oi" which the outer tube is secured reinovably to said insulator and carries a bracket with a contact leg hinged thereto while the inner tube has a grip fastened to its outer ene and adapted to take hold ot a line wire, said contact leg being provided with an inv terchangeable contact member and arranged so as to be swung out ata right angle troni the extensible inetal tube in order to inake contact with a second line wire.

The annexed drawing represents one workf ing example ot a short-circuiting rod according to the present invention. Fig. l is a side elevation showing the position of parts before contact is inade. Fig. 2 is a side elevation showing the position of parts some inoinents after the contact has been broken be tween the lines. Fig. 3 is a 'cross-section on an enlarged scale of the short-circuiting leg.

The end of a handle a inade oit an insulating substance is provided with a ribbed insulator and carries a inetal tube which will be called the outer tube and wherein is held slidably and resiliently by ineans ofk a strong spring al an inner metal tube c having a contact-grip e of a well known torni at its outer end., which grip is adapted to afford a secure patch and contact on conductors of varying diameters. To the saine tube is also affixed a clamp j adapted to maintain the contact leg h in the inoperative position shown in Fig. l. This contact leg is hinged to a horizontal bracket arm g to which it is also attached by ineans of a tension spring z'. This spring tends to bring the leg /t in a position perpendicular` to tube Z). .fr Small rope pulley Ic mounted in a bracket attached to the inner tube c and extended through a slot to the outside of tube guides wire rope Z which is attached at one end to the leg 71, at h1 and at its other end to the end of tube at b1. The Contact leg is provided on its outer side with a contact wire h2 extended between two sinall brackets and on vits inner side with a grip ita,A arranged exactly at the convenient spot where it may be seized by the clamp in the inoperative position or' the leO.

The handling ci' the short-eircuiting rod is in the case oi two conductors as follows:

Preferably the upper ot the two conductors which are to be connected together is seized with the contact-grip e'. By a pull on handle a the tube Yc is withdrawn from tube l). This operation will stretch the spring Z and relieve grip 7b3 from clainp f. The rope pulley will be slid upwards and the rope Z be slackened. Spring z' is now rtree to pull the leg` h downwards7 and the stronger the pull on the handle a the more leg 7L will Yfollow the spring c' and finally leg ZL will stand nearly perpendicularly to rod Z9 and the Contact wire h2 will come to rest on and make Contact with the conductor which was to be connected to the upper cone ductor in order to short-circuitthe two conductors. The lower conductor will be touched solely by wire h2 and therefore any sparking at the nioinent of short-circuiting can only take eect on wire 7a2. This sparking is therefore liinited to said wire which is easily replaced while all other parts of the rods remain intact. The inner tube c inay be tixed within tube b by giving to the handle a slight twist which will cause the small bracket ot the rope pulley 7u to be caught in a recess provided within the slot of tube In the case of a three phase current where three conductors are to be connected a clanip g1 which is electrically connected by nietal to the bracket arni g is employed. The third conductor is generally located just beneath the first, and after having hooked in the first wire with grip e this third wire may be easily caught by said clanip while the leg L makes Contact with the second wire and then the tension of spring Z quite alone will suffice to maintain the rod in the position of keeping the three conductors connected without need of further handling the rod. ln both cases, a tyre phase or a three phase current, the operating ot' the described rod will establish a short circuit between the lines which short circuit is closed in the first case through grip e; tube c, tube d, bracket g; leg 71. and Contact member 7b2 and in the second case the circuit is closed with the two other wires by the clamp g1 and all the parts mentioned 'for the second case.

In Fig. 3 is shown in a cross-section a modified form and arrangement ot the contact member oit leg it. Instead oi a. wire 71,2 a bar s o'l carbon or oi an equivalent substance :is dovetailed Within a slot of leg 7L.

Having now tuily described my invention what I claim is:

l. In a short-circuiting rod and in combination a .first slotted tube having a bracket standing oli sideways; a second tube arranged slidably Within the first and resiliently attached thereto; a contact grip at the end ot said second tube; a leg hinged to said bracket and carrying a contact member; a tension spring attached to said bracket and said leg and adapted to establish the operative position of the leg; a grip provide-d on the leg and a clamp on the second tube and adapted to hold the leg by said grip in its inoperative position substantially as shown and described.

2. In a short-circuiting rod and in combination a first slotted tube having a bracket standing oli sideways; a second tube arranged slidably Within the first and resiliently attached thereto; a cont-act grip at the end oi said second tube; a leg hinged to said bracket and carrying a Contact member; `a tension spring attached to said bracket and said leg and adapted to estab'lish vthe operative position of the leg; a small bracket carrying a rope pulley mounted on the second tube and extended through the slotted part of the first tube and a rope attached to the first tube and the leg and guided by said rope pulley so as to regulate the deflection of the legl according to the withdrawal of the second from the first .tube substantially as shown and descril'ied.

3. In av short-circuiting rod and in com bination a .First slotted tube having a bracket standing' ott' sideways; a second tube :irranged slidably within the {irst and resilien tly attached thereto; a contactgrip at the end oit said second tube; a ieg hinged to said bracket and carrying a contact member; and a second contact grip provided on the first tube on the opposite side to that Where the leg is hinged to, all substantially as shown and described.

4. In a short-circuiting rod and in co1nbinat'ion an insulated handle; a first slotted tube fixed thereto and having a bracket standing off sideways; a second tube arranged slidably Within the irst and resiliently attached thereto; a Contact grip on the second tube, a leg hinged to said bracket and carrying a Contact member; a second contact grip on the tiret tube opposite to Where the legr hinged to it; a tension spring attached to said bracket and said (leg and adapted to establish thc operative position ot said leg; means for controlling the dc- `ilection ot the leg according to the withdrawal of the second from the first tube and means for securing t-he leg in its inoperative position, substantially as shown and described.

In testimony whereof I affix my signature.

PAUL GOSSLAR. 

